JP2626454C - - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes, for example, a facsimile printer and a copying machine.
In various electrophotographic devices, etc., the paper loaded on the paper feed table is
And a sheet feeding device that feeds out the paper sequentially. 2. Description of the Related Art In recent years, a paper feeder for feeding paper in such an electrophotographic apparatus or the like has been developed.
In order to increase the capacity with the speeding up of the printing process, a paper feeding device in which paper is replenished as follows is adopted. First, when replenishing the paper, the paper feed table in which the paper is loaded and
Lower the paper tray to the lowest point, and pull the paper feed table
put out. Next, the sheets to be replenished are stacked on the drawn sheet feed table, and
The paper feed table is stored by pushing it in via a slide rail or the like. [0003] However, a so-called drawer as described above is used.
For a paper feeder of the type, a space for pulling out the paper feed table
Therefore, there is a problem in saving space in the installation place. Also stored paper feed
A slide rail or the like is used to pull out the table to the front, then push it in and store it.
It is necessary to pull out the stored paper feed table,
Paper feed table for loading and storing, and a drive unit to raise and lower the paper feed table
A coupling mechanism for opening and connecting to the structure is required, and to reduce costs
There is a problem. The present invention aims to solve these problems,
It is an object of the present invention to provide a sheet feeding device that can save space and further reduce costs.
. [0004] A paper feeder according to the present invention achieves the above-mentioned objects.
(A) The upper part can be opened at the position in the paper feeding state where the paper is fed out and supplied.
(B) The paper is provided so as to be able to move up and down while maintaining a horizontal state toward this opening,
(C) The paper loaded on this paper feed table is sequentially fed out from the topmost paper.
(D) opening and closing the feeding portion, and opening and closing the opening portion in a direction perpendicular to a feeding direction of the sheet;
An opening / closing lid whose rotation axis for opening / closing operation is located outside the position corresponding to the sheet feeding table;
At least a part of the feeding unit is loaded on the paper feed table in the operating state.
Extending on the paper to be fed, and being retractable from the paper feed table in conjunction with the opening operation of the opening / closing lid, and at least partially extending on the paper.
To detect the presence or absence of stacked paper, and interlock with the retracting operation of the feeding unit.
And a sheet presence / absence detection unit also provided so as to be retractable from above the sheet supply table.
When the opening / closing lid is opened, the upper side of the sheet placing surface of the sheet feeding table is completely
It is characterized by being in an open state. Thus, when replenishing the paper, the paper is fed to the paper feeding state.
From above through an opening that is openable at the top
On a paper feed table that can be moved up and down while maintaining a horizontal state
The paper is supplied by loading the paper. Next, feed paper in this way
The paper replenished and stacked on the table is fed by the feeding section sequentially from the top sheet.
It is fed out and supplied to a photosensitive drum or the like. By the way, at least a part of the feeding section is located on a sheet feeding table.
In the case where the paper is extended on the paper to be stacked, at least a part of the feeding portion is
It is preferable that the sheet can be retracted from the sheet feeding table. In addition, this paper feed
At least a part of the paper presence / absence detector that detects the presence / absence of paper loaded on the
In the case where the paper is extended on the paper stacked on the paper feed table,
At least a part of the paper presence / absence detection unit is at least a part of the feeding unit of the feeding unit.
Can also be evacuated from the paper feed table as well as from the paper table.
Is preferred. If it is possible to retreat in this way, replenishment from above
It becomes easy when stacking papers. When an opening / closing lid is provided at the opening,
In conjunction with opening of the lid, at least a part of the feeding section, and further, of the paper presence / absence detecting section.
It is preferable that at least a part of the sheet can be retracted from the sheet feeding table. In addition, before
At least a part of the feeding portion may be a pick roller and the presence or absence of the paper
At least a part of the detection unit is used when there is no paper loaded on the paper feed table.
In the hole formed in the paper feed table, fit the axis of the axis located on the side of this paper feed table.
Paper empty detection lever that pivots downward and its leading end fits
Can be [0008] Further, for example, the pick-low described above interlocked with the opening of the opening / closing lid.
The paper is retracted and the paper empty detection lever is retracted as follows.
Can be done. 1. Support the pick roller so that it cannot rotate in the forward and reverse directions, and rotate the shaft
In conjunction with the opening of the opening / closing lid, the link mechanism moves the pick roller to the axis of the axis.
The rotation is performed so that it is pivoted upward. 2. Supports the paper empty detection lever so that it can rotate forward and backward, and rotates the pick roller forward and backward.
The shaft located on the side of the paper feed table, supported so that it cannot rotate, interlocks with the opening of the open / close lid.
Link mechanism causes the pick roller to rotate upward about its axis.
And the pick roller rotated upward is used to detect the paper empty detection lever.
This is done by engaging the key and turning it upward. On the other hand, it is preferable that the opening / closing lid is constituted by a two-fold lid.
In addition, the structure of the two-fold lid is such that each one side connecting each other has
A first and a second half lid pivotally attached to each other about an axis along the side
The second half lid is opposed to one side of the second half lid.
On the side, the second half lid is along the other side with respect to the main body of the sheet feeding device.
It can be pivotally engaged about an axis. In addition, as the two-fold lid
May be provided so that the lid is opened as follows and the open state is maintained.
desirable. 1. When opening the lid, lift the first half lid and place it on the first half lid.
The other side opposite to the one side is an end face on the main body side of the sheet feeding device.
The back side of the first half lid and the back side of the second half lid face each other while sliding on the top.
The lid is opened by pushing it toward the second half lid. 2. In the open state, the second half cover is substantially vertically erected in a state in which the rotation of the second half cover in the opening direction with respect to the main body side of the paper feeding device is prevented, and the second half cover thus erected
So that the first half lid leans on the one side with an inclined bear in the lid opening direction.
Then, the open state is maintained. Other objects of the present invention will become apparent from the detailed description given below. However
Although the detailed description and specific examples describe the most preferred embodiments,
Various modifications and alterations within the spirit and scope of the present invention will occur to those skilled in the art from the detailed description.
For clarity, it is described only as a specific example. Next, a specific embodiment of the paper feeding apparatus according to the present invention will be described with reference to the drawings.
I will explain. First, in FIG. 1, for example, a facsimile, a printer, a copier, etc.
The present invention provided separately from the electrophotographic apparatus main body 2 in the electrophotographic apparatus 1 of the present invention.
The separation type paper feeder 3 to which is applied an electrophotographic
Used together with the device body 2. In addition, three levels of paper feed to the electrophotographic equipment body 2
A tray 4 is provided, and the sheet feeding device 3 and the sheet feeding tray 4 are provided.
Papers 5, 5 'selected from among the stacked papers 5, 5' are
Is sequentially fed from the uppermost sheet of the sheets 5, 5 'loaded with
It is supplied to a photosensitive drum and the like (not shown) in the container main body 2. Thus, this
A desired image is formed on the supplied paper by a well-known electrophotographic process using a photosensitive drum or the like.
The image is transferred, and printing, copying, and the like are performed. Next, referring to FIG. 2, in the paper feeder 3 to which the above-described present invention is applied.
On the upper surface side of the housing 6, the paper is fed and supplied to the electrophotographic apparatus main body 2.
Foldable lid structure that can be opened and closed at the position in the paper feeding state shown in FIG.
An opening 8 is provided, which is provided with an opening / closing lid 7 so that the upper part can be opened. This
A paper hopper 9 whose upper side is opened is provided in the housing 6 of
When the paper feed table 10 is provided in the paper hopper 9 in a horizontal state and in a loosely fitted state.
Both of the above-mentioned sheets of a predetermined size, for example, A4 size, are placed on the sheet feeding table 10.
5 are loaded. The two-fold open / close lid 7 is composed of a front lid 7A and a rear lid 7B.
The front lid 7A and the rear lid 7B are connected to each other on one side, in other words, on each upper side in FIG. 2, by a pair of hinges 11a and 11b.
By being screwed on, they are rotatable relative to each other about an axis along their upper side.
Is being worn. Also, the other side of the rear lid 7B opposite to the one side,
In other words, when screwed to the rear lid 7B on the lower side in FIG.
A pair of supporting brackets 12a and 12b pivotally supported are provided on the housing 6 side which is the main body side.
This allows the rear lid 7B to rotate around the axis along the lower side of the housing 6 with respect to the housing 6.
Has been tied to. This rotation axis is located outside the corresponding position of the sheet feeding table 10.
doing. Note that the support fittings 12a, 12b are pivotally supported by the support fittings 12a, 12b.
A convex portion is formed on the b side, and a concave portion for receiving the convex portion is formed on the housing 6 side.
In both cases, the front lid 7A and the rear lid 7B are, as shown in FIG.
Engagement parts 13a and 13b for catching hands to lift 7A and rear lid 7B are formed.
Has been established. Thus, when opening the lid from the closed state shown in FIG.
The front cover 7A is lifted by catching a hand on the engaging portion 13a of the front cover 7A, and the front cover 7A is lifted.
The left side of the left side with respect to the front lid 7 and the rear lid 7B which are opened on the housing 6 side
While sliding on the upper end surfaces 14a, 14b on both right sides, the back side of the front lid 7A and the rear lid
7B so as to face the back side, and then push it to the lid 7B side.
Open the lid. Also, by opening the lid in this manner, the rear lid 7B is attached to the housing 6
2 in the direction of arrow a shown in FIG.
It is turned in the lid direction and stands upright. Next, when the rear lid 7B stands upright
The lower end surfaces of the pair of support fittings 12a and 12b abut on the upper end surface 14c of the housing 6.
As a result, further rotation in the opening direction a is prevented, and
7B so that the front lid 7A leans on the upper side in an inclined state in the lid opening direction a.
As a result, the fall of the rear cover 7B is supported, and the opened state is maintained. Open / close lid like this
Reference numeral 7 denotes the opening of the opening 8 in a direction perpendicular to the paper feeding direction b.
In this state, the upper part of the position corresponding to the paper feed table is completely open as shown in the figure.
. In order to close the cover from the open state, the above operation may be performed in a reverse procedure.
Therefore, no particular description is given here. In addition, the engaging portion 13 in the rear lid 7B
b is merely because the front lid 7A and the rear lid 7B are molded from the same mold in order to share parts, and particularly achieves the same effect as the engaging portion 13a in the front lid 7A.
It is not useful. On the other hand, the paper feed table 10 is provided with the following mechanisms.
You. A support mechanism A for supporting the sheet feeding table 10 so as to be able to move up and down while keeping the sheet feeding table horizontal. When the paper is fed, the uppermost one of the papers 5 stacked on the paper feed table 10 is used.
The paper feed level for raising the paper so as to be held at the paper feed level indicated by arrow X in the figure.
Holding mechanism B. When the paper is replenished, the paper loaded on the paper feed table 10 is higher than the paper feed level X.
The paper feed tray is loaded so that it is stacked at the lower paper supply level indicated by arrow Y.
If no paper is loaded on the table 10, the paper feed table 10
When the paper 5 is loaded on the paper feed table 10, the loaded paper is
5 is lowered so that the uppermost sheet of sheets 5 is maintained at the sheet supply level Y.
Paper supply level holding mechanism C. The sheet feeding direction b on the opening side of the sheet hopper 9 is
The paper 5 loaded on the paper table 10 is sequentially fed out from the uppermost paper and
A feeding mechanism D for supplying the child photographic device main body 2 is provided. Also, a paper feed table
A sheet presence / absence detection member (not shown) for detecting whether or not sheets are stacked on the sheet 10
And a part of the feed level holding mechanism B described above.
The top sheet among the sheets 5 stacked on the table 10 is set at the sheet feeding level X.
A paper level detection member (not shown) for detecting whether the
Have been. Next, the support mechanism A, the paper supply level holding mechanism B and the paper supply level
The bell holding mechanism C is based on the mechanism schematic shown in FIGS. 2 and 3.
It will be described sequentially. (1) Supporting mechanism A The paper hopper 9 feeds the paper to the left and right side walls 9a and 9b in the paper feeding direction b.
Each pair of guide grooves 15, 15 (15 ', 15') arranged along the direction b
It is formed by drilling downward. In these guide grooves 15, 15 (15 ′, 15 ′), the feeding direction of the paper on the paper feed table 10 which is loosely fitted in the paper hopper 9.
b, the guide grooves 15, 15 (15 ', 15')
The protruding portions 16, 16 (16 ', 16') projecting correspondingly are loosely inserted.
. On the other hand, outside the left and right side walls 9a and 9b of the paper hopper 9, a pair of upper and lower
Two pairs of pulleys 17a to 17d; 17a 'to 17d along the paper feeding direction b.
'Are fixed to the left and right side walls 9a and 9b. these
Each pair of pulleys 17a to 17d; 17a 'to 17d'
Each endless wire is sewn so that a vertical portion is formed along the lifting surface.
Loops 18 and 18 'are wound and stretched. Each of these endless wires to be stretched
In the vertical portion of the ropes 18 and 18 ', the feed table 10 is
0 is fixed in a horizontal state by each of the projections 16, 16 (16 ', 16').
Thus, the paper feed table 10 is suspended. Thus, the sheet feeding table 10 is raised toward the opening 8 while being kept in a horizontal state.
It is supported so that it can descend. (2) Feeding level holding mechanism B Outside the rear side wall 9c of the sheet hopper 9 with respect to the sheet feeding direction b.
, A pair of pulleys 19a, 19b on the left and right with respect to the feeding direction b as a pair of upper and lower sides.
19a 'and 19b' are provided. These pulleys 19a, 19b; 19a
, 19b ', the upper pulleys 19a, 19a' are individually
Each of the pulleys 19b,
19b 'are connected by a common rotating shaft 20, and the rotating shaft 20
9 is fixed by being rotatably supported forward and backward on a rear wall 9c. Also
A gear 23 meshing with a gear 22 of a drive motor 21 is coaxially fixed to the rotating shaft 20.
And the forward / reverse rotation of the drive motor 21 is transmitted to the pulleys 19b, 19b '.
It is configured as follows. On the other hand, a pair of upper and lower pulleys 19a, 19b;
Endless rubber belts 24, 24 'are wound and stretched between 19a', 19b '.
ing. Each of the stretched endless rubber belts 24, 24 'is provided with a sheet feeding table 1.
0 are engaged with the engagement pieces 25, 25 'from below.
In the left and right sides of the rear side wall 9c of the sheet hopper 9 with respect to the feeding direction b, and is loosely fitted into a pair of guide grooves 26 and 26 'formed to be formed vertically.
It is protruding. In this way, when feeding paper, the drive motor 21 is rotated forward and the endless rubber
The belts 24, 24 'run in the forward direction c shown in the drawing,
The engagement pieces 25, 25 'provided on the belts 24, 24'
And is engaged from the lower side. Then, they are engaged with these engagement pieces 25, 25 '.
Of the sheets 5 stacked on the sheet feeding table 10
That the top sheet of paper has reached the paper feed level X by the paper feed level detecting member.
It is detected and is raised until the drive motor 21 stops. Also, as the paper is fed,
Whether the top sheet by the paper feed level detecting member is positioned at the paper feed level X
The drive motor 21 is rotated forward based on the detection of the
It is raised to be held at X. (3) Paper replenishment level holding mechanism C The upper side of the paper feeding direction b outside the left and right side walls 9a and 9b of the paper hopper 9.
For each pulley 17c, 17c 'of the support mechanism A provided and positioned
Each pulley 27, 27 'is provided in a shaft shape. Each of these pulleys 27, 27 '
Are wound with respective wire ropes 28, 28 '
End portions of the paper feed tables 10 and 16 '
′), The other end is also hung down, and one end is fixed to the bottom of the housing 6.
Coil springs 29, 29 'are connected to the other end side. Each of these tension coil bars
If the sheets are not stacked on the sheet feeding table 10, the sheets 29 and 29 '
When the paper feed table 10 and paper are stacked on the paper feed table 10
The uppermost sheet among the stacked sheets 5 is held at the sheet supply level Y.
The spring constant is selected so as to urge such a lifting power to the sheet feeding table 10.
. Thus, when replenishing the paper, the paper level holding mechanism B
The drive motor 21 is rotated in the reverse direction and the endless rubber belts 24, 24 '
The end pieces 25 of the endless rubber belts 24, 24 'are run in a direction opposite to the direction c.
, 25 ′ are lowered and the engagement with the paper feed table 10 is released, so that when no paper is loaded on the paper feed table 10,
When sheets are stacked on the sheet feeding table 10, the stacked sheets 5
The sheet supply table 10 is lowered until the top sheet of the sheet reaches the sheet supply level Y.
It is. When the sheets to be replenished are stacked on the sheet feeding table 10, the stacking
The top sheet of the sheets to be fed is lowered so as to be held at the sheet supply level Y.
It is. Subsequently, the above-mentioned feeding mechanism D, the sheet presence / absence detecting member and the sheet feeding
The bell detecting member will be sequentially described based on a partially enlarged perspective view shown in FIG.
I will tell. (A) Feeding mechanism D The feeding direction is set on the side of the sheet feeding table 10 on the side of the feeding direction b.
b is rotationally driven by the first rotating shaft 35 and further by a different driving motor (not shown).
The second and third rotating shafts 36 and 37 are arranged sequentially. this
The first to third rotating shafts 35 to 37 are rotatably supported by the housing 6 so as to be rotatable forward and backward.
It is fixed at. First, the first rotating shaft 35 is placed on the sheet feeding table 10 during operation.
Shown on the uppermost sheet by its own weight.
A pair of pick rollers 38a and 38b, which can be contacted from above,
The common rotating shaft 39 of the rollers 38a and 38b is supported at one end side so as to be freely rotatable forward and backward.
By fixing the other end sides of both support arms 40a and 40b to the first rotation shaft 35,
, Forward and reverse rotation with respect to the first rotation shaft 35 through the two support arms 40a and 40b.
It is provided so as not to be rolled. These pick rollers 38a, 38b have
Each fixedly mounted on the first and second rotating shafts 35 and 36 and the common rotating shaft 39
The gears 41 to 43, and the intermediate gears arranged between the gears 41 to 43 and meshing with each other.
The rotation is sequentially transmitted from the second rotation shaft 36 side by the gears 44 and 45.
Have been. Further, the first rotation shaft 35 and the second rotation shaft 36 have the first rotation shaft therebetween.
An endless feed belt 46 is wound around the rotating shaft 35 so as to be slidable and stretched.
The endless feed belt 46 has an endless feed
A driven roller 47 is provided to face the belt 46. In addition, the third round
The transport shaft 37 is fixedly provided with three transport rollers 48a to 48c, and the transport rollers 48a to 48c are provided above the transport rollers 48a to 48c.
The driven rollers 49a to 49c are provided to face each other. In this way, the second and third rotating shafts 36 and 37 are driven by the different driving described above.
The motor rotates the third rotating shaft 37 later than the second rotating shaft 36 to rotate both
The shafts 36 and 37 are intermittently rotated in the directions indicated by arrows d and e.
Of the paper stacked on the paper feed table 10 by the pick rollers 38a and 38b.
The paper is fed from the top sheet, and the fed paper is fed to the endless feed belt 46 and
And the driven rollers 47, and also the transport rollers 48a to 48c and the driven rollers 49a.
Are supplied to the electrophotographic apparatus main body 2 by being sequentially pinched and transported between
You. (B) Sheet presence / absence detecting member The first rotating shaft 35 is also provided with a common rotating shaft 39 for the pick rollers 38a and 38b.
The upper side of the support arm 40b in the drawing with respect to the one support arm 40b
Engagement which can be brought into contact with the end from above and which is engaged with the support arm 40b by the abutment
The paper empty detection lever 51 having the side 50 integrally is opposed to the first rotation shaft 35.
It is provided so as to be rotatable forward and backward. In addition, this paper empty detection
For the lever 51, a light emitting element and a light receiving element for receiving light from the light emitting element
And a paper empty sensor 52 composed of
The light emitting element and the light receiving element of the paper empty sensor 52
Positioned when paper is loaded to block light from light emitting element to light receiving element
The light shielding side 53 is provided integrally. Furthermore, this paper empty detection lever
The leading end of the sheet feed table 10 is fitted into the sheet feeding table 10 in correspondence with the leading end of
Is formed. Thus, at the time of the sheet feeding operation, similarly to the pick rollers 38a and 38b, etc.
The sheet empty extending on the sheets stacked on the sheet feed table 10
The detection lever 51 is used when paper is stacked on the paper feed table 10.
The paper prevents the leading end from being fitted into the hole 54, and the paper is turned downward by its own weight.
The light-shielding side 53 of the paper empty detection lever 51 is prevented from moving.
It remains located between the light emitting element and the light receiving element of the sensor 52. By the way, when the paper is exhausted on the paper feed table 10, the leading end of the paper is prevented from being fitted into the hole 54.
Since the sheet is not present, the sheet is rotated downward around the axis of the first rotating shaft 35 by its own weight.
As a result, the leading end thereof fits into a hole 54 formed in the sheet feeding table 10 and is blocked.
The light side 53 is out of the position between the light emitting element and the light receiving element of the paper empty sensor 52.
And it is detected that there is no paper. (C) Feeding Level Detecting Member The first rotating shaft 35 is further moved in the feeding direction b of the sheet from the sheet feeding table 10.
At a position distant to the right with respect to the first rotating shaft 35.
The bar 55 cannot rotate forward and reverse, and the paper feed level detection release lever 56 can rotate forward and reverse.
At the center thereof. These paper level detection levers
-55 and the first rotation of the paper feed level detection release lever 56 in the drawing
One end of the shaft 35 in the feeding direction b is provided with a paper feed level detection lever 5.
5, a light-emitting element and a light-receiving element that receives light from the light-emitting element are used.
A paper feed level sensor 57 is provided, and the paper feed level sensor 57 is provided.
Paper loaded on the paper feed table 10 between the light emitting element and the light receiving element
5 is at the paper feed level X, the paper feed level detection lever
The side 58 of the -55 at one end thereof can be positioned. Also, paper level detection
The release lever 56 detects the paper level detection in the direction indicated by the arrow f.
A tension coil spring 59 that biases the release lever 56 to rotate is provided and connected.
Have been. On the other hand, on the other end side with respect to the first rotating shaft 35, the sheet feeding level detection is released.
The lever 56 feeds paper by rotating the tension coil spring 59 in the direction of arrow f.
The lower end of the level detection lever 55 is abutted, and the paper feed level is determined by the abutment.
A locking side 60 for locking the detection lever 55 and lifting it in the arrow direction f is provided integrally.
Have been. Also, it is driven only when feeding paper and when detecting the paper feeding level,
The paper feed level detection release lever 56 is shown against the urging force of the
Is turned in the direction opposite to the arrow direction f to release the engagement with the paper feed level detection lever 55.
The plunger 61 is connected. As described above, when the sheet is not fed and the sheet feeding level is not set, the plunger 61 is not driven.
Outside the detection time, as shown in the figure, the rotation of the tension coil spring 59 locks the paper feed level detection release lever 56 on the lock side 60, and the paper feed level detection lever
-55 is lifted in the direction of arrow f, and further pick-up via the first rotating shaft 35.
Rollers 38a, 38b, etc., are on the uppermost sheet loaded on the sheet feed table 10.
Lifted to a floating state. Further, when the plunger 61 is driven,
When the paper feed level is detected, the engagement side 60 of the paper feed level detection release lever 56 is locked.
The lifting of the paper feed level detection lever 55 due to the stop is released and the pick roller 38a is released.
, 38b are placed above the uppermost sheet loaded on the sheet feed table 10 by its own weight.
Will be contacted by At this time, the light emitting element of the paper feed level sensor 57 and
A side 58 on one end side of the sheet feeding level detection lever 55 is located between the light receiving element and the light receiving element.
In this case, it is detected that the uppermost sheet is at the sheet feeding level X, and
If not, it is detected that the uppermost sheet is not at the sheet feeding level X. By the way, between the housing 6 and the opening / closing lid 7, at both ends of one side surface
A link 63 having projections 62a and 62b is interposed.
The opening 62 is pivotally supported by the opening / closing lid 7 with a projection 62a. On the other hand, the other protrusion 62b
With the opening / closing lid 7 being opened and closed in the guide groove 64 formed in the housing 6 side in the vertical direction.
When the opening / closing lid 7 is opened, the guide groove 64 is moved upward from the lower side.
When the lid 7 is closed, it is guided downward from above and moved.
It is loosely fitted. By the way, as shown in FIG. 5, the other protrusion 62b is
While the guide groove 64 is being moved upward, the other protrusion 62 b
A retracting plate that flips up with the movement and rotates the first rotating shaft 35 in the direction of the arrow f.
65 is fixed to the right end of the first rotating shaft 35 in the sheet feeding direction b.
. In this way, the first rotary shaft 35 moves in the direction of the arrow in conjunction with the opening of the opening / closing lid 7.
f, the pick rollers 38a, 38b are supported via the support arms 40a, 40b.
38b is engaged with the support arm 40b, and the paper empty detection lever 51 is moved to the first position.
Of the pick roller 38a, 38
b, the paper empty detection lever 51 is retracted from the paper feed table 10 and
This makes it easier to load sheets to be replenished on the cable 10 from above. In addition, opening and closing
When the lid 7 is opened, the interlock switch is turned off, and the various sensors, the drive motor, and the like are inoperative. In this embodiment, an electrophotographic apparatus is used as a paper feeding apparatus to which the present invention is applied.
The separation type, which is provided separately from the device main body, has been described.
It goes without saying that the present invention can be applied to a device integrated with the device main body. In this embodiment, a pair of upper and lower sides is provided on both left and right sides with respect to the paper feeding direction b.
2 pairs of pulleys 17a to 17d and 17a 'to 17d'
However, three pairs of pulleys and four or more pairs of pulleys may be provided. This embodiment
In the first embodiment, the sheet feeding table 10 is formed using a pair of endless rubber belts 24, 24 'and the like.
Although the horizontal zero state was maintained, a pair of opposed ends using one endless rubber belt, for example,
It is also possible to provide a common rotation shaft for the pulleys 17b and 17b '. The endless wire ropes 18, 18 'used in this embodiment are annular wires.
An ear rope may be used, or the projections 16, 16 (16 ', 16',
16 ') may be a single wire rope connected. Also, endless
An endless fiber rope may be used instead of the yaropes 18 and 18 '. In addition, this implementation
Although the endless rubber belts 24 and 24 'are used in the example, the endless rubber belts 24 and 24' are used.
, 24 'may be an endless chain. As described above, it is apparent that the present invention can be variously modified. This
Such changes do not depart from the spirit and scope of the present invention and
All such obvious modifications and changes are intended to be included within the scope of the appended claims. As described above, according to the present invention, the paper to be replenished is
Directly from above through an opening that allows the upper part to be open at the position in the paper state
Since the paper is immediately stacked on the paper feed table, the paper feed table
There is no need for a space to draw out, or a slide rail, etc.
And cost savings. Further, the opening / closing lid provided at the opening is constituted by a two-fold lid.
In addition, the structure of the two-fold lid is composed of first and second half lids that are rotatably engaged with each other on one side connecting each other around an axis along the one side.
And the other side of the second half lid opposite to the one side.
The second half lid of the lever is positioned around an axis along the other side with respect to the main body side of the paper feeding apparatus.
When opening the lid, lift the first half lid, and
The other side of the first half lid opposite to the one side is a book of the paper feeding device.
The back side of the first half lid and the second half lid are slid on the end face on the body side
By pushing it to the second half lid side with the back side of
If the lid is opened, the opening and closing operation can be performed lightly and the height of the gas spring etc.
Cost components are not required. In the open state, the sheet feeding of the second half lid is performed.
Stands substantially vertically in a state where rotation in the opening direction with respect to the main body side of the device is prevented.
The first half lid is opened on the one side by the second half lid which is erected.
Lean in the direction of the lid and lean so that the open state is maintained.
For example, the first half lid supports the fall of the second half lid, and safety is ensured. Furthermore, the first
And a second half lid having the same shape symmetrically arranged and rotatably engaged with each other.
If this is the case, products can be shared and costs can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a use state diagram of a separation-type sheet feeding device according to the present invention, which is installed in an electrophotographic apparatus for explaining a specific embodiment of the present invention. FIG. 2 is an overall perspective view of a sheet feeding device according to the present invention. FIG. 3 is a schematic diagram of a mechanism of a sheet feeding device according to the present invention. FIG. 4 is a partially enlarged perspective view of FIG. 2; FIG. 5 is an operation explanatory view when the opening / closing lid of FIG. 4 is opened. [Description of Signs] 1 Electrophotographic equipment 2 Electrophotographic equipment main body 3 Paper feeder 4 Paper feed tray 5, 5 'Paper 6 Housing 7 Opening / closing lid 7A Front lid 7B Rear lid 8 Opening 9 Paper hopper 10 Paper feed table 11a , 11b Hinge 12a, 12b Supporting fittings 13a, 13b Engagement portions 14a, 14b, 14c Upper end surfaces 15, 15 ', 26, 26', 64 Guide grooves 16, 16 'Projection portions 17a-d, 17'a- d, 19a, 19b, 19a ', 19b', 27, 27 'Pulley 18, 18' Endless wire rope 20, 39 Rotary shaft 21 Drive motor 22, 23, 41, 42, 43 Gear 24, 24 'Endless rubber belt 25 , 25 'engaging pieces 28, 28' wire rope 29, 29 'tension coil spring 35 first rotating shaft 36 second rotating shaft 37 third rotating shafts 38a, 38b pick rollers 40a, 40b support arm 44 45 Intermediate gear 46 Endless field belts 47, 49a-c Followed rollers 48a-c Conveying rollers 50 Engagement side 51 Paper empty detection lever 52 Paper empty sensor 53 Light shielding side 54 Hole 55 Paper supply level detection lever 56 Paper supply level detection release lever 57 Paper feed level sensor 58 Side side 59 Tension coil spring 60 Locking side 61 Plungers 62a, 62b Projection 63 Link 65 Evacuation plate

Claims (1)

Claims: 1. An opening which can be opened upward at a position in a sheet feeding state in which a sheet is fed and supplied, and (b) a horizontal state is maintained toward the opening. (C) a feeding unit for feeding and feeding the paper loaded on the paper feeding table sequentially from the top sheet, and (d) the opening A unit that opens and closes in a direction perpendicular to the sheet feeding direction, and includes an opening / closing lid in which a rotation axis of the opening / closing operation is positioned outside the sheet feeding table corresponding position;
At least a part of the feeding unit is configured to extend on the paper stacked on the paper feed table in the operating state, and to be retractable from the paper feed table in conjunction with the opening operation of the opening / closing lid. And at the same time, detecting whether or not there is a sheet stacked at least partially extended on the sheet, and removably provided from the sheet supply table in conjunction with the retreat operation of the feeding portion. A sheet feeding device, comprising a sheet presence / absence detecting section, wherein when the opening / closing lid is opened, a portion above the sheet placement surface of the sheet feeding table is completely opened. (A) an opening which can be opened upward at a position in a paper feeding state where the paper is fed out and supplied; and (b) an opening which can be raised and lowered while maintaining a horizontal state toward the opening. A sheet feeding table on which sheets are stacked, (c) a feeding section for sequentially feeding and feeding the sheets stacked on the sheet feeding table from the uppermost sheet, and (d) the opening portion of the sheet. An opening / closing lid that opens and closes in a direction orthogonal to the feeding direction, and a rotation axis of the opening / closing operation is located outside the position corresponding to the sheet feeding table;
At least a portion of the feeding portion extends on sheets stacked on the sheet feeding table, and at least a portion of the feeding portion retracts from the sheet feeding table in conjunction with opening of the open / close lid. This retraction is performed by moving at least a part of the feeding portion so that the feeding portion cannot rotate in the normal and reverse directions, and moving a shaft located on the side of the sheet feeding table toward the opening of the opening / closing lid by a link mechanism. Is performed by rotating at least a part of the paper feeding portion so as to be pivoted upward about the axis of the shaft, and when the opening / closing lid is opened, the upper part of the paper loading surface of the paper feeding table is completely removed. A sheet feeding device which is opened. (A) an opening which can be opened upward at a position in a paper feeding state where the paper is fed out and supplied; (b) a vertically movable opening is provided toward the opening while maintaining a horizontal state. A sheet feeding table on which sheets are stacked, (c) a feeding section for sequentially feeding and feeding the sheets stacked on the sheet feeding table from the uppermost sheet, and (d) the opening portion of the sheet. An opening / closing lid that opens and closes in a direction orthogonal to the feeding direction, and a rotation axis of the opening / closing operation is located outside the position corresponding to the sheet feeding table;
At least a part of the feeding unit is extended on sheets stacked on the sheet feeding table, and at least a part of the feeding unit is retracted from the sheet table in conjunction with opening of the open / close lid. And at least a part of a paper presence / absence detection unit that at least partially extends on the paper and detects the presence / absence of the stacked paper is also retracted from the paper supply table, and the opening / closing lid is opened. The sheet feeding device is characterized in that the upper part of the sheet placing surface of the sheet feeding table is completely opened when the sheet feeding is performed. Wherein said lid is claims, characterized in that it is composed of two Orifuta
4. The paper feeding device according to 2 or 3.